 /*******************************************************************************
  * Copyright (c) 2005, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.navigator.resources.actions;

 import org.eclipse.core.runtime.IAdaptable;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.jface.action.IMenuManager;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.ISelectionProvider;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.window.IShellProvider;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.ui.IActionBars;
 import org.eclipse.ui.actions.ActionContext;
 import org.eclipse.ui.actions.ActionFactory;
 import org.eclipse.ui.dialogs.PropertyDialogAction;
 import org.eclipse.ui.navigator.CommonActionProvider;
 import org.eclipse.ui.navigator.ICommonActionExtensionSite;
 import org.eclipse.ui.navigator.ICommonMenuConstants;
 import org.eclipse.ui.texteditor.IWorkbenchActionDefinitionIds;

 /**
  * Adds the properties action to the menu.
  *
  * @since 3.2
  *
  */
 public class PropertiesActionProvider extends CommonActionProvider {

     private PropertyDialogAction propertiesAction;
     private ISelectionProvider delegateSelectionProvider;

     public void init(final ICommonActionExtensionSite aSite) {
         
         delegateSelectionProvider = new DelegateSelectionProvider( aSite.getViewSite().getSelectionProvider());
         propertiesAction = new PropertyDialogAction(new IShellProvider() {
             public Shell getShell() {
                 return aSite.getViewSite().getShell();
             }
         },delegateSelectionProvider);
         propertiesAction.setActionDefinitionId(IWorkbenchActionDefinitionIds.PROPERTIES);
     }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.actions.ActionGroup#fillContextMenu(org.eclipse.jface.action.IMenuManager)
      */
     public void fillContextMenu(IMenuManager menu) {
         super.fillContextMenu(menu);
         menu.appendToGroup(ICommonMenuConstants.GROUP_PROPERTIES,
                 propertiesAction);
     }
     
     /* (non-Javadoc)
      * @see org.eclipse.ui.actions.ActionGroup#fillActionBars(org.eclipse.ui.IActionBars)
      */
     public void fillActionBars(IActionBars actionBars) {
         super.fillActionBars(actionBars);

         actionBars.setGlobalActionHandler(ActionFactory.PROPERTIES.getId(),
                 propertiesAction);
     }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.actions.ActionGroup#setContext(org.eclipse.ui.actions.ActionContext)
      */
     public void setContext(ActionContext context) {
         super.setContext(context);

         propertiesAction.selectionChanged(delegateSelectionProvider
                 .getSelection());

     }

     private class DelegateIAdaptable implements IAdaptable {

         private Object delegate;

         private DelegateIAdaptable(Object o) {
             delegate = o;
         }

         /*
          * (non-Javadoc)
          *
          * @see org.eclipse.core.runtime.IAdaptable#getAdapter(java.lang.Class)
          */
         public Object getAdapter(Class adapter) {
             if (adapter.isInstance(delegate)) {
                 return delegate;
             }
             return Platform.getAdapterManager().getAdapter(delegate, adapter);
         }
     }

     private class DelegateSelectionProvider implements ISelectionProvider {

         private ISelectionProvider delegate;

         private DelegateSelectionProvider(ISelectionProvider s) {
             delegate = s;
         }

         /*
          * (non-Javadoc)
          *
          * @see org.eclipse.jface.viewers.ISelectionProvider#addSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
          */
         public void addSelectionChangedListener(
                 ISelectionChangedListener listener) {
             delegate.addSelectionChangedListener(listener);

         }

         /*
          * (non-Javadoc)
          *
          * @see org.eclipse.jface.viewers.ISelectionProvider#getSelection()
          */
         public ISelection getSelection() {
             if (delegate.getSelection() instanceof IStructuredSelection) {
                 IStructuredSelection sSel = (IStructuredSelection) delegate
                         .getSelection();
                 if (sSel.getFirstElement() instanceof IAdaptable) {
                     return sSel;
                 }

                 return new StructuredSelection(new DelegateIAdaptable(sSel
                         .getFirstElement()));
             }
             return delegate.getSelection();
         }

         /*
          * (non-Javadoc)
          *
          * @see org.eclipse.jface.viewers.ISelectionProvider#removeSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
          */
         public void removeSelectionChangedListener(
                 ISelectionChangedListener listener) {
             delegate.removeSelectionChangedListener(listener);

         }

         /*
          * (non-Javadoc)
          *
          * @see org.eclipse.jface.viewers.ISelectionProvider#setSelection(org.eclipse.jface.viewers.ISelection)
          */
         public void setSelection(ISelection selection) {
             delegate.setSelection(selection);

         }

     }

 }

